Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando o rating oficial 4+ atingiu 4.633.925?
 ###Tabelas: CREATE TABLE 80_million_to_99_million_records (80_million_to_99_million_records_id AUTO_INCREMENT PRIMARY KEY, Artist VARCHAR, Country of origin VARCHAR, Period active VARCHAR, Release-year of first charted record INT, Genre VARCHAR, Claimed sales VARCHAR) CREATE TABLE rank_by_number_of_wins (rank_by_number_of_wins_id AUTO_INCREMENT PRIMARY KEY, City & Nation VARCHAR, First Place INT, Second Place INT, Third Place INT, Total Top 3 Placements INT, First Place Winning Year(s) (if applicable) VARCHAR) CREATE TABLE rating_figures (rating_figures_id AUTO_INCREMENT PRIMARY KEY, Episode INT, Date VARCHAR, Official rating 4+ VARCHAR, Share 4+ VARCHAR, Official rating 16-39 VARCHAR, Share 16-39 VARCHAR) CREATE TABLE barry_bonds_73_home_runs (barry_bonds_73_home_runs_id AUTO_INCREMENT PRIMARY KEY, Number VARCHAR, Date VARCHAR, Pitcher VARCHAR, Team VARCHAR, Inning VARCHAR, Length VARCHAR) CREATE TABLE defunct_competitions (defunct_competitions_id AUTO_INCREMENT PRIMARY KEY, Years VARCHAR, Type VARCHAR, Original code VARCHAR, Current code VARCHAR, Location VARCHAR)  
SELECT Date FROM rating_figures WHERE Official rating 4+ = 4 633 925